408: A lot of heat coming through the firewall.

dwomby · #1 (**permalink**) 07-05-22, 10:05 AM

Quote:

Originally Posted by AndrewA

On mine it's 13mm int diameter, 20mm external.

Thanks, Andrew. I thought it looked a skinny one!

Looking around the web, I think the heater valve is the same as the Jaguar MK2 C.16559. So that's what I ordered. Time will tell if I got it right.

David

AndrewA · #2 (**permalink**) 07-05-22, 12:47 PM

More money but probably worth getting a radiator guy to flush out/pressure test the little matrix as well - it wasn't much money in the scheme of things - about £70 from memory...or perhaps one thing at a time!

David C · #3 (**permalink**) 07-05-22, 07:04 PM

I haven't tried it but ceramic coating the headers is supposed to help keep down under bonnet temperature. Anyone any experience of this?

AndrewA · #4 (**permalink**) 18-05-22, 07:13 AM

Any progress?

dwomby · #5 (**permalink**) 18-05-22, 09:22 AM

Some.

I bypassed the heater matrix and that seems to have helped a little. I have a replacement water valve for the heater but haven't fitted it yet.

The car is now stored for the summer. Yes, I know that sounds wrong but I spend summer in Nova Scotia and leave the car here in Florida. I expect to have to do more when I get it out again in the autumn. It is a lot of hot iron in a tight space. I have no doubt more airflow through the engine compartment would be a big difference but don't see how to achieve it.

David